Balance Sheet Components - Schedule of Property and Equipment Net (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 27,788	$ 27,178
Less accumulated depreciation and amortization	(10,497)	(9,232)
Total property and equipment, net	17,291	17,946
Laboratory Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	17,577	16,769
Computer Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	568	556
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,444	1,444
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	7,274	7,274
Construction in Progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 925	$ 1,135

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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